In the fifth inning against the A's Saturday, Verlander did this (see the video below) with David DeJesus at the plate.
After the umps scratched their heads for awhile, they eventually decided Verlander had thrown an extremely illegal pitch. A balk was called, the runner on first base moved to second and DeJesus' at-bat continued.
We still don't understand what the #$#& the righty was doing, and we've watched it 10 times. In the end, we're calling it this: The greatest (and weirdest) balk ever.